What skin typing system indicates transitioning from red to pink to brown during a breakout?

The correct choice describes the Robert's skin typing system, which is designed to assess skin conditions by observing the changes that occur during a breakout. This system focuses on how the skin reacts under stress or when inflamed, particularly during acne flare-ups. Transitioning from red to pink to brown indicates a progression of inflammation and subsequent healing in the skin.

In contrast, the Fitzpatrick system categorizes skin types primarily based on their response to UV exposure and their propensity for tanning or burning. The Lancaster system focuses on the aging process and evaluates the skin's condition primarily in relation to sun exposure. The Glogau system classifies skin aging according to the appearance of fine lines, wrinkles, and pigmentation. None of these systems emphasize the specific transitional color changes during an active breakout as the Robert's system does.